I Can Become Stronger by Eating Dirt, so What Else Do I Want?

Zhang Beihai was tricked into mining on the moon by his second uncle, a shady intermediary. I thought I could get rich overnight. Unexpectedly, the salary was not enough to buy oxygen. Until the mine collapsed, he activated the [Ancient Earth-Eating Beast System] [Do you need to consume helium-3 crystals to unlock the Maw of Steel? What! Can you become stronger by eating soil?